Did You Know...
...that a workman who left the soap mixing machine on too long was responsible for making Ivory Soap? He was so embarrassed by his mistake that he threw the mess in a stream. Imagine his dismay when the evidence of his error floated to the surface! Result: Ivory soap, the soap that floats.
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| Number | Title | Issue Date |
| 5579398 | Electro-acoustic transducer This invention relates to electro-acoustic transducers such as is generally indicated at 10 and which comprise a body 11 defining a chamber 12, a plate 13 bearing a micro-phone or speaker 14 to which is attached a stalk 15, a diaphragm 16, connectable to ... | 11/26/1996 |
| 5127870 | Echo-type toy megaphone A toy megaphone including a housing having a number of openings formed in the upper end, a member fixed in an upper portion of the housing, and a spring biased between the member and a lower end of the housing, and the member and the spring being caused t... | 07/07/1992 |
| 4195707 | Communicating device A device for communicating in which a hollow frustum extending outwardly from a flat base has tabs at the ends thereof for holding a relatively rigid diaphragm having spaced apart apertures therein. A pair of these devices are interconnected by a cord or ... | 04/01/1980 |
| 4194095 | Fluid flow control speaker system A fluid flow control system has a fluid source and plural flow pipes connected to the fluid source. Each of the pipes has an opening of a specific area corresponding to one of the bit orders of a PCM (Pulse Code Modulated) input signal. The flow-condition... | 03/18/1980 |
| 4187635 | Method and apparatus for sound production An apparatus and method for producing sound, particularly unusual sound effects, wherein the apparatus comprises at least one diaphragm and a spring attached to the diaphragm, having a lowest resonance frequency less than 18 hertz. The apparatus includes ... | 02/12/1980 |
| 4002897 | Opto-acoustic telephone receiver An opto-acoustic telephone receiver, for converting optical signals propagating in an optical fiber waveguide into audible acoustic signals, includes an optical absorption cell having a volume of the order of 10-.sup.3 cm3, acoustica... | 01/11/1977 |
